HttpResponse输出文件
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm3.aspx.cs" Inherits="布局.WebForm3" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID ="btnExport" runat ="server" Text ="导出"
onclick="btnExport_Click" />
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO; namespace 布局
{
public partial class WebForm3 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ } protected void btnExport_Click(object sender, EventArgs e)
{
try
{
List<FileInfo> fileList = new List<FileInfo>();
string fileName1 = @"D:\Export\新建 Microsoft Office Excel 工作表1.xlsx";
string fileName2 = @"D:\Export\新建 Microsoft Office Excel 工作表2.xlsx";
fileList.Add(new FileInfo(fileName1));
fileList.Add(new FileInfo(fileName2)); string fileName = "Export_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".zip";
//调用方法
string targetZipFilePath =Server.MapPath("/")+ "Export\\" + fileName;// 扩展名可随意
//压缩csv文件
FileCompression.Compress(fileList, targetZipFilePath, , ); //把压缩文件输出到浏览器
System.Web.HttpResponse Response = System.Web.HttpContext.Current.Response;
Response.Clear();
Response.ContentType = "application/zip";
Response.AddHeader("Content-Disposition", "attachment; FileName=" + HttpUtility.UrlEncode(fileName));
Response.BinaryWrite(File2Bytes(targetZipFilePath));
Response.OutputStream.Flush();
Response.OutputStream.Close();
Response.End();//这句代码不能少，否则可能导致输出的文件数据不全，导致解压时出现压缩格式未知的错误 //删除产生的压缩文件
try
{
FileInfo fi1 = new FileInfo(targetZipFilePath);
fi1.Delete();
}
catch (Exception ex)
{ }
}
catch (Exception ex)
{
ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "CreateExcelErrorTip", "alert('Export Failed！');", true);
return;
}
} public static byte[] File2Bytes(string path)
{
if (!System.IO.File.Exists(path))
{
return new byte[];
} FileInfo fi = new FileInfo(path);
byte[] buff = new byte[fi.Length]; FileStream fs = fi.OpenRead();
fs.Read(buff, , Convert.ToInt32(fs.Length));
fs.Close(); return buff;
}
}
}
压缩用到的
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using System.Threading; namespace 布局
{
public class FileCompression
{
public FileCompression()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
#region 加密、压缩文件 /// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileNames">要打包的文件列表</param>
/// <param name="GzipFileName">目标文件名</param>
/// <param name="CompressionLevel">压缩品质级别（0~9）</param>
/// <param name="SleepTimer">休眠时间（单位毫秒）</param>
public static void Compress(List<FileInfo> fileNames, string GzipFileName, int CompressionLevel, int SleepTimer)
{
ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));
try
{
s.SetLevel(CompressionLevel); //0 - store only to 9 - means best compression
foreach (FileInfo file in fileNames)
{
FileStream fs = null;
try
{
fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
}
catch
{ continue; }
// 方法二，将文件分批读入缓冲区
byte[] data = new byte[];
int size = ;
ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));
entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);
s.PutNextEntry(entry);
while (true)
{
size = fs.Read(data, , size);
if (size <= ) break;
s.Write(data, , size);
}
fs.Close();
file.Delete();
Thread.Sleep(SleepTimer);
}
}
finally
{
s.Finish();
s.Close();
}
}
#endregion #region 解密、解压缩文件
/// <summary>
/// 解压缩文件
/// </summary>
/// <param name="GzipFile">压缩包文件名</param>
/// <param name="targetPath">解压缩目标路径</param>
public static void Decompress(string GzipFile, string targetPath)
{
//string directoryName = Path.GetDirectoryName(targetPath + "\\") + "\\";
string directoryName = targetPath;
if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录
string CurrentDirectory = directoryName;
byte[] data = new byte[];
int size = ;
ZipEntry theEntry = null;
using (ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile)))
{
while ((theEntry = s.GetNextEntry()) != null)
{
if (theEntry.IsDirectory)
{// 该结点是目录
if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);
}
else
{
if (theEntry.Name != String.Empty)
{
//解压文件到指定的目录
using (FileStream streamWriter = File.Create(CurrentDirectory + theEntry.Name))
{
while (true)
{
size = s.Read(data, , data.Length);
if (size <= ) break; streamWriter.Write(data, , size);
}
streamWriter.Close();
}
}
}
}
s.Close();
}
}
#endregion
}
}
压缩DLL https://pan.baidu.com/s/1kIgRcvvzB5ZybHITsRi4ZQ
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